/Engine/Plugins/Runtime/MeshModelingToolset/Source/MeshModelingTools/Public/DrawPolygonTool.h
Test if target would like to begin sequence based on this click. Gets checked both on mouse down and mouse up.
true if target wants to begin sequence
virtual bool CanBeginClickSequence ( const [FInputDeviceRay](API\Runtime\InteractiveToolsFramework\FInputDeviceRay) & ClickPos )